# I blew up an LED, is my Arduino Elegoo UNO R3 fine?

**URL:** <https://forum.arduino.cc/t/i-blew-up-an-led-is-my-arduino-elegoo-uno-r3-fine/1350873>\
**Category:** LEDs and Multiplexing\
**Created:** [February 5, 2025, 10:43pm UTC](https://forum.arduino.cc/t/i-blew-up-an-led-is-my-arduino-elegoo-uno-r3-fine/1350873 "2025-02-05T22:43:09Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![PerryBebbington](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/perrybebbington/32/238766_2.png) [@PerryBebbington](https://forum.arduino.cc/u/PerryBebbington)\
**Post date:** [February 13, 2025, 6:28am UTC](https://forum.arduino.cc/t/i-blew-up-an-led-is-my-arduino-elegoo-uno-r3-fine/1350873/7 "2025-02-13T06:28:46Z")

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@randomarduino13122 ,

Lesson learnt, don't worry about it. Test your remaining LEDs, if they light then they are OK. Don't forget the resistors! LEDs are cheap, buy some more.

Occasionally someone posts in the forum insisting resistors are not needed for LEDs, if you see such a post you are now fully qualified to tell the poster why they are wrong.

Here's one of my mistakes:

> [@Breadboard current limit](https://forum.arduino.cc/t/breadboard-current-limit/1334682/1):
>
> Often we tell newbies not to power motors and other high current devices through breadboard because it cannot carry the necessary current. The damage in the photo wasn't caused by a motor, it was caused by an accidental short I didn't notice until I smelled burning, but I think it illustrates the point. Oh! Why Bar Sport? So you can all have a laugh at my expense! Comments welcome laughing

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